CN111451825B

CN111451825B - Horizontal lead screw device for large machine tool

Info

Publication number: CN111451825B
Application number: CN202010255456.8A
Authority: CN
Inventors: 王海龙; 伍志健
Original assignee: Jiangsu Guiyu Aviation Industry Co ltd
Current assignee: Jiangsu Guiyu Aviation Industry Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2022-03-11
Anticipated expiration: 2040-04-02
Also published as: CN111451825A

Abstract

The invention discloses a horizontal lead screw device for a large-scale machine tool, which comprises a lead screw main body, wherein a nut mechanism is arranged on the lead screw main body, the nut mechanism comprises a nut main body, the nut main body is rotationally connected with the lead screw main body through threads, two sides of the lower surface of the nut main body are respectively provided with a groove, a spring is arranged in each groove, the lower ends of the springs are fixedly provided with a tension column, the lower ends of the two tension columns are fixedly connected with a bottom plate, two sides of each bottom plate are respectively provided with a convex block, the upper surface of each convex block is provided with a hanging rod, the nut main body and the bottom plate of the nut mechanism are connected through the springs, a bearing part is transferred onto the bottom plate from the nut main body, the bottom plate transfers the self gravity onto the bearing block and the bearing plate through the hanging rods, the whole bearing part is not arranged on the nut main body, and the nut main body only plays a role of guiding, and then the lead screw atress is little, avoids its emergence flagging condition, guarantees mechanical precision.

Description

Horizontal lead screw device for large machine tool

Technical Field

The invention relates to the technical field of machine tools, in particular to a horizontal lead screw device for a large-scale machine tool.

Background

Machine tools are machines for manufacturing machines, also called machine tools or machine tools, which are conventionally referred to as machine tools for short. Generally, the machining method is divided into a metal cutting machine, a forging machine, a woodworking machine and the like. In modern machine manufacturing, a plurality of methods for machining mechanical parts comprise cutting machining, casting, forging, welding, stamping, extruding and the like, but all parts with higher precision requirements and finer surface roughness requirements are generally subjected to final machining by a cutting method on a machine tool. The machine tool plays an important role in the construction of national economy modernization. A lathe is a machine tool for turning a rotating workpiece mainly with a lathe tool. The lathe can also be used for corresponding processing by using a drill bit, a reamer, a screw tap, a die, a knurling tool and the like. Lathes are used primarily for machining shafts, discs, sleeves and other workpieces having a surface of revolution, and are the most widely used type of machine tool in machine manufacturing and repair plants.

The lead screw device of a large machine tool generally needs to bear larger force, the self bearing capacity of the lead screw is poorer, the horizontal lead screw is easy to droop under the action of gravity, and particularly in the process of high-speed operation, the mechanical precision is greatly influenced under the condition, so that the problem needs to be solved by the horizontal lead screw with strong bearing capacity.

Disclosure of Invention

The invention aims to provide a horizontal screw device for a large-scale machine tool, which solves the problem that the mechanical precision is influenced because the screw has poor bearing capacity and is easy to droop in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a horizontal screw device for large-scale lathe, includes the lead screw main part, install nut mechanism in the lead screw main part, nut mechanism includes the nut main part, the nut main part passes through the screw thread with the lead screw main part and rotates and be connected, the lower surface both sides of nut main part all are seted up flutedly, the internally mounted of recess has the spring, the lower extreme of spring is fixed with the pulling force post, and the lower extreme fixedly connected with bottom plate of two pulling force posts, the both sides of bottom plate all are fixed with the protrusion piece, the last fixed surface of protrusion piece has the jib, two be fixed with the atress piece between the upper end of jib, the top of lead screw main part is provided with the atress board, and the atress board is located the lower of atress piece.

Preferably, the screw rod further comprises a bracket, and two ends of the screw rod main body are mounted on the bracket through bearings.

Preferably, both ends of the stress plate are welded on the inner sides of the brackets, and the two brackets are symmetrical about the center of the stress plate.

Preferably, the upper end of the spring is fixed with the upper end of the groove through the spring seat, and the lower end of the spring is fixed with the upper end of the tension column through the spring seat.

Preferably, rollers are arranged on two sides of the lower surface of the stress block, and the end portions of the rollers are fixed to the lower surface of the stress block through a connecting frame.

Preferably, a left-right through limit groove is formed in the position, corresponding to the roller, of the upper surface of the stress plate.

Preferably, the outer surface of the roller is provided with a rubber pad, and the roller is inserted into the limiting groove.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the nut mechanism, the nut main body is connected with the bottom plate through the spring, the bearing part is transferred onto the bottom plate from the nut main body, the bottom plate transfers the self gravity onto the stress block and the stress plate through the hanging rod, the whole bearing part is not arranged on the nut main body, the nut main body only plays a role in guiding, and further the stress of the lead screw is small, so that the situation of sagging of the lead screw is avoided, and the mechanical precision is guaranteed;

2. according to the invention, the roller is arranged on the lower surface of the stress block, rolling friction is generated between the roller and the stress plate, and the friction force borne by the lower surface of the stress block is reduced, so that the whole operation of the device is smoother.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of the present invention without the bracket installed;

fig. 3 is a front view of the installation of the drum of the present invention.

In the figure: 1. a support; 2. a lead screw body; 3. a nut mechanism; 31. a nut body; 32. a groove; 33. a spring; 34. a tension column; 35. a protruding block; 36. a base plate; 37. a spring seat; 4. a boom; 5. a stress block; 6. a drum; 61. a rubber pad; 7. a limiting groove; 8. a stress plate; 9. and a connecting frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a horizontal screw device for a large-scale machine tool includes a bracket 1 and a screw main body 2, two ends of the screw main body 2 are mounted on the bracket 1 through bearings, an external motor may be disposed outside the bracket 1, and the motor may drive the screw main body 2 to rotate forward and backward;

referring to fig. 1 and 2, a nut mechanism 3 is mounted on a lead screw main body 2, the nut mechanism 3 includes a nut main body 31, the nut main body 31 is rotatably connected with the lead screw main body 2 through threads, the nut main body 31 can be driven to reciprocate when the lead screw main body 2 rotates, grooves 32 are formed in both sides of the lower surface of the nut main body 31, springs 33 are mounted inside the grooves 32, tension columns 34 are fixed to the lower ends of the springs 33, bottom plates 36 are fixedly connected to the lower ends of the two tension columns 34, the upper ends of the springs 33 are fixed to the upper ends of the grooves 32 through spring seats 37, the lower ends of the springs 33 are fixed to the upper ends of the tension columns 34 through spring seats 37, the tension columns 34 are connected with the nut main body 31 through the springs 33, and the tension columns 34 can provide an upward tension to the bottom plates 36;

with reference to fig. 1 and 2, two sides of a bottom plate 36 are both fixed with a protruding block 35, the upper surfaces of the protruding blocks 35 are fixed with suspenders 4, a stress block 5 is fixed between the upper ends of the two suspenders 4, a stress plate 8 is arranged above a lead screw main body 2, two ends of the stress plate 8 are welded on the inner sides of the brackets 1, the two brackets 1 are symmetrical about the center of the stress plate 8, the stress plate 8 is positioned below the stress block 5, the stress block 5 gives an upward tensile force to the bottom plate 36 through the suspenders 4, the gravity of the bottom plate 36 borne by the stress block 5 is pressed on the stress plate 8, and the stress plate 8 is a main bearing component;

referring to fig. 1, 2 and 3, rollers 6 are disposed on both sides of the lower surface of the stress block 5, the end of each roller 6 is fixed to the lower surface of the stress block 5 through a connecting frame 9, a left-right through-penetrating limiting groove 7 is disposed on the upper surface of the stress plate 8 corresponding to the roller 6, a rubber pad 61 is disposed on the outer surface of each roller 6, the rollers 6 are inserted into the limiting grooves 7, when the nut mechanism 3 moves horizontally, the whole stress block 5 also moves, rolling friction occurs between the rollers 6 and the stress plate 8 to reduce the sliding friction force of the stress block 5, so that the entire operation of the device is smooth, the motor drives the screw rod body 2 to rotate in the forward and backward directions, the screw rod body 2 drives the nut mechanism 3 to move horizontally, the gravity of the component to be moved in a reciprocating direction is stressed on the bottom plate 36, the stress block 5 gives an upward pulling force to the bottom plate 36 through the suspension rod 4, and the gravity of the bottom plate 36 born by the stress block 5 presses on the stress plate 8, the stress plate 8 is a main bearing part, when the nut mechanism 3 moves horizontally, the stress block 5 also moves horizontally, and the roller 6 can rotate in the limiting groove 7, so that the friction force between the stress block 5 and the stress plate 8 is reduced, and the whole device can run smoothly.

The working principle and the using process of the invention are as follows: when the device is used, parts needing to reciprocate are arranged below the bottom plate 36, the motor drives the screw rod main body 2 to rotate forwards and backwards, the screw rod main body 2 drives the nut mechanism 3 to move horizontally, the gravity of the parts needing to reciprocate is stressed on the bottom plate 36, the stress block 5 gives an upward tensile force to the bottom plate 36 through the suspender 4, the gravity of the bottom plate 36 borne by the stress block 5 is pressed on the stress plate 8, the stress plate 8 is a main bearing part, when the nut mechanism 3 moves horizontally, the stress block 5 also moves horizontally, the roller 6 can rotate in the limiting groove 7 to reduce the friction force between the stress block 5 and the stress plate 8, and the whole device can run smoothly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a horizontal lead screw device for large-scale lathe, includes lead screw main part (2), its characterized in that: the screw rod main body (2) is provided with a nut mechanism (3), the nut mechanism (3) comprises a nut main body (31), the nut body (31) is rotationally connected with the screw rod body (2) through threads, both sides of the lower surface of the nut body (31) are provided with grooves (32), a spring (33) is arranged in the groove (32), a tension column (34) is fixed at the lower end of the spring (33), the lower ends of the two tension columns (34) are fixedly connected with a bottom plate (36), the two sides of the bottom plate (36) are both fixed with a convex block (35), the upper surface of the convex block (35) is fixed with a suspension rod (4), a stress block (5) is fixed between the upper ends of the two suspension rods (4), the screw rod is characterized in that a stress plate (8) is arranged above the screw rod main body (2), and the stress plate (8) is located below the stress block (5).

2. The horizontal lead screw device for large machine tools according to claim 1, characterized in that: the screw rod is characterized by further comprising a support (1), wherein two ends of the screw rod main body (2) are mounted on the support (1) through bearings.

3. The horizontal lead screw device for large machine tools according to claim 2, characterized in that: the two ends of the stress plate (8) are welded on the inner sides of the brackets (1), and the two brackets (1) are symmetrical about the center of the stress plate (8).

4. The horizontal lead screw device for large machine tools according to claim 1, characterized in that: the upper end of the spring (33) is fixed with the upper end of the groove (32) through a spring seat (37), and the lower end of the spring (33) is fixed with the upper end of the tension column (34) through the spring seat (37).

5. The horizontal lead screw device for large machine tools according to claim 1, characterized in that: the two sides of the lower surface of the stress block (5) are provided with rollers (6), and the end parts of the rollers (6) are fixed with the lower surface of the stress block (5) through connecting frames (9).

6. The horizontal lead screw device for large machine tools according to claim 5, characterized in that: and a left-right through limiting groove (7) is formed in the position, corresponding to the roller (6), of the upper surface of the stress plate (8).

7. The horizontal lead screw device for large machine tools according to claim 6, characterized in that: the outer surface of the roller (6) is provided with a rubber pad (61), and the roller (6) is inserted into the limiting groove (7).